S32 SDK
FTM Signal Measurement

Example application showing the FTM's Signal Measurement functionality

Application description


The purpose of this demo application is to show you the usage of the FlexTimer's Signal Measurement functionality from the S32K148 CPU using the S32 SDK API.

  • The application is configured to generate a PWM signal with a variable frequency which will be measured another FTM instance. The measurement result will be sent to the host PC via LPUART.

Prerequisites


The run the example you will need to have the following items:

  • 1 S32K148 board
  • 1 Power Adapter 12V (if the board cannot be powered from the USB port)
  • 1 Dupont cable (type depending on the board header type)
  • 1 Personal Computer
  • 1 Jlink Lite Debugger (optional, users can use Open SDA)
  • UART to USB converter if it is not included on the target board. (Please consult your boards documentation to check if UART-USB converter is present).

Boards supported


The following boards are supported by this application:

  • S32K148EVB-Q100
  • S32K148-MB

Hardware Wiring

The following connections must be done to for this example application to work:

PIN FUNCTION S32K148EVB-Q100 S32K148-MB
FTM0 Out Channel 0 (PTC0) J3.11 - J2.11 J11.31 - J10.29
FTM1 Input Channel 0 (PTB2) J3.11 - J2.11 J11.31 - J10.29
LPUART1 TX (PTC7) UART_TX - wired on the board J11.26 - J20.2
LPUART1 RX (PTC6) UART_RX - wired on the board J11.25 - J20.5

How to run


1. Importing the project into the workspace

After opening S32 Design Studio, go to File -> New S32DS Project From... and select ftm_signal_measurement_s32k148. Then click on Finish.
The project should now be copied into you current workspace.

2. Generating the Processor Expert configuration

First go to Project Explorer View in S32 DS and select the current project(ftm_signal_measurement_s32k148). Then go to Project and click on Generate Processor Expert Code
Wait for the code generation to be completed before continuing to the next step.

3. Building the project

Select the configuration to be built FLASH (Debug_FLASH) or RAM (Debug_RAM) by left clicking on the downward arrow corresponding to the build button(. Wait for the build action to be completed before continuing to the next step.

4. Running the project

Go to Run and select Debug Configurations. There will be four debug configurations for this project:

Configuration Name Description
ftm_signal_measurement_s32k148 Debug_RAM Jlink Debug the RAM configuration using Segger Jlink debuggers
ftm_signal_measurement_s32k148 Debug_FLASH Jlink Debug the FLASH configuration using Segger Jlink debuggers
ftm_signal_measurement_s32k148 Debug_RAM PEMicro Debug the RAM configuration using PEMicro debuggers
ftm_signal_measurement_s32k148 Debug_FLASH PEMicro Debug the FLASH configuration using PEMicro debuggers


Select the desired debug configuration and click on Launch. Now the perspective will change to the Debug Perspective.
Use the controls to control the program flow.

Note
For more detailed information related to S32 Design Studio usage please consult the available documentation.

Notes


For this example it is necessary to open a terminal emulator and configure it with:

  • 115200 baud
  • One stop bit
  • No parity
  • No flow control
  • '\n' line ending